- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361092 > NCP1562A (ON SEMICONDUCTOR) High Performance Active Active Clamp/Reset PWM Controller Controller(高性能有效Clamp/Reset PWM控制器) PDF資料下載
參數(shù)資料
| 型號(hào)： | NCP1562A |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | High Performance Active Active Clamp/Reset PWM Controller Controller(高性能有效Clamp/Reset PWM控制器) |
| 中文描述： | 高性能主動(dòng)有源鉗位/復(fù)位PWM控制器控制器（高性能有效鉗位/復(fù)位的PWM控制器） |
| 文件頁數(shù)： | 16/26頁 |
| 文件大小： | 277K |
| 代理商： | NCP1562A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
NCP1562A, NCP1562B
http://onsemi.com
16
Figure 36. Soft-Stop Behavior After Soft-Start
is Complete and V
EA
is Open.
(V
EA
is not controlling the duty cycle)
V
EA
FF Ramp
V
SS
If the voltage on the V
AUX
pin reaches V
AUX(off2)
, C
SS
is
immediately discharged and the outputs are disabled. V
SS
should not be pulled up or down externally.
CURRENT LIMIT
The
NCP1562
cycle-by-cycle and cycle skip, providing the best
protection during momentary and continuous overcurrent
conditions.
has
two
overcurrent
modes,
Cycle-by-Cycle
In cycle-by-cycle, the conduction period ends once the
voltage on the CS pin reaches the current limit voltage
threshold (V
ILIM
). The NCP1562A has a V
ILIM
of 0.2 V
and the NCP1562B has a V
ILIM
of 0.5 V.
Cycle Skip
Traditionally, a voltage on the CS higher than V
ILIM
has
been used to trigger a cycle skip fault. Unfortunately, the
fast response time of modern controllers makes it hard to
reach a voltage on the CS pin higher than V
ILIM
.
Instead of using a higher voltage threshold to detect a
cycle skip fault, the NCP1562 uses a timer. It monitors the
current
limit
comparator
cycle-by-cycle current limit condition exists the converter
is disabled. The time to disable the converter and the time
the converter is disabled are programmed by the capacitor
on the CSKIP pin, C
CSKIP
.
The cycle skip detection circuit charges C
CSKIP
with a
continuous 100 A current once cycle-by-cycle current
limit fault is detected. If the current limit fault persists,
C
CSKIP
continues to charge until reaching the cycle skip
upper threshold (V
CSKIP(peak)
) of 3.0 V. Once reached, the
converter enters the soft–stop mode and C
CSKIP
is
discharged with a constant 10 A current. A new soft-start
sequence commences once C
CSKIP
reaches the lower cycle
skip threshold (V
CSKIP(valley)
) of 0.5 V. If the overcurrent
condition is still present, the capacitor starts charging on
the next current limit event. Otherwise, C
CSKIP
is
discharged down to 0 V.
The cycle skip capacitor provides a means of
remembering previous overcurrent conditions. If a
continuous overcurrent condition is removed before
reaching V
CSKIP(peak)
, C
CSKIP
starts a controlled
discharge. If the continuous overcurrent fault is once again
detected before C
CSKIP
is completely discharged, C
CSKIP
charges from its existing voltage level, taking less time to
reach V
CSKIP(peak)
. Figure 37 shows operating waveforms
during a continuous overcurrent condition. For optimal
operation, the cycle skip discharge time should be longer
than the soft-stop period.
and
if
a
continuous
Figure 37. Cycle Skip Waveforms
V
CSKIP(valley)
V
CSKIP(peak)
V
CSKIP
CS
V
ILIM
V
SS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCP1562B | High Performance Active Active Clamp/Reset PWM Controller Controller(高性能有效Active Clamp/Reset PWM控制器) |
| NCP1729 | Switched Capacitor Voltage Inverter |
| NCP1729SN35T1 | Switched Capacitor Voltage Inverter |
| NCP1729SN35T1G | Switched Capacitor Voltage Inverter |
| NCP21WB473 | for Surface Mounting Application |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1562A WAF | 制造商:ON Semiconductor 功能描述: |
| NCP1562ADBR2G | 功能描述:電壓模式 PWM 控制器 HI PERF RESET PWM CONTLR RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| NCP1562ADR2G | 功能描述:電壓模式 PWM 控制器 HI PERF RESET PWM CONTLR RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| NCP1562BDBR2G | 功能描述:電壓模式 PWM 控制器 HI PERF RESET PWM CONTLR RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| NCP1562BDR2G | 功能描述:電壓模式 PWM 控制器 HI PERF RESET PWM CONTLR RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。